Fluid-compressor.



W. PREL LWITZ. FLUID COMPRESSOR.

APPLICATION FILED SEPT. 15, 1908. 1,0693? Patented Aug. 5, 1918.

5 SHEETSSHBET l.

W, PRELLWITZ.

FLUID COMPRESSOR. APPLICATION FILED SEPT.15,1908.

Patented Aug". 5, 1913.

5 SHEETS-SHEET 2.

W. PRELLWITZ.

FLUID COMPRESSOR.

APPLICATION FILED SEPT. 15, 190B.

Patented Aug. 5, 1913.

5 SHEETS-SHEET 3.

PRELLWITZ.

FLUID COMPRESSOR. APPLIGATlON FILED SEPT. 15, 190e,

Patented Aug. 5, 1913.

5 SHEETS-SHEET 4.

W. PRELLWITZ. FLUID COMPRESSOR.

APPLICATION FILED SEPT. 15, 1908.

Patented Aug. 5, 1913.

5 MEET -SHEET s.

IQWifiZEWA III/11L Zifgwaea FLUIB-G-DI EPRESEQQ.

application filed ie'cceinber .1 o on whom it may concern:

a citizen of the United States, and a resident of Boston, in the county of Northampton.

and State of Pennsylvania, have invented a new and useful Improvement in Fluid- Compressors, of which the following is a specification.

My invention relates to fluid compressors,

such, for instance, as'air compressors, and

IOVld8 certain impact machine may be produced which is in; every Way suitable for raising air to lll ll pressure in an economical manner end 111 which the several parts of the machine are;

readily accessible;

In the accompanying drawings, F gure l a View in side elevation of the air com- I prcssor embodying my improvements, oertain of the parts being broken away, Fig. 2'

is an end View of the same, Fig. 3 is a to plan view, Fig. l is a similar View with the top of the water tank removed to more" clearly shoe. the parts Within the tank, Fig.

5 is an enlarged longitudinal vertical 58C;

tion through the upper portion of the com pressor, Fig; 5 is a detail section through;

the Wall of the second intermediate cylinder, taken at another an le'to that of the cy'lin dcr in Fi 5 to the baci.

-,showing' the passage leading? cylinder piston, Fig. 6 is an enlarged longi- Q tudinal. vertical section through the lowerl portion of the compressor, Fig. i is a detail View in side elevation on an enlarged scale of the first intermediate compressor cylin der and its inlet and discharge valve casings, Fig. 8 is a horizontal section taken in the plane of the line Err-A of '5', loolo in the direction of the arrow 9 is c. section taken in the plane of the line 3-3 of Fig. looking in the direction of the .irrows, and Fig. 10 is a detail section taken.

in the plane of the line 0 C of Fig. 8, looking in the direction of the arrows.

The compound compressor *herein shown and described is of the single acting type, the low pressure cylinder denoted by 1, its piston by the firstintermediate cylinder by 3, its piston.

by t; the second intermediate cylinder by 5, its piston by 6; and the lllgii pressure cylj inder by. Be it known that I, WILLmi-r Pen-Lumen,

. pressure end'i'irst intermediate compressoi said cylinder. Theout er plate of tl'i'is low ?etented sing. 5,1?913.

155. Serial 3%. 453,156.

' and its piston by 8. The. low

and first intermediate cylinders are in elinement'and the high and second intermediate cylinders j are in. alinement with the low ressure cylinder arranged above the first intermediate cylinder and the high pressure cylinder arranged above the second intermediate cylinder. These cylinders are rigidly support-ed upon a suitable frame 9 uprisiirg from a. base 9*, which base forms a, bearing support for the crenlr shaft 10 of the compressor. To this crank shaft 10 the pistons oi the low and first intermediate'cylinders are connected by a pitman rod 11 and the pistons of the high and second intermediate cylinders are connectedby a pitmah'i'od 12, the connectionscf these rods 11 and 1'2 with the crank shaft 3L0 being such that. as thelow pistons start from the limit/of theirmove' ment, the high and second intermediate compressor pistons are about half Way ofi their downward movement.

The motor: which is. herein shown for driving the crank shaft 10 of the compressor is denoted by 13 and its shaft 14 is connected to the crank shaft lOthro'ugh a fly wheel 15, as follows sleeve 1'6 is keyed on to the end or" the crar shz'iit 10, which sleeve is proyided with flange 17 overleppin' the centrsl porti l8 bf the fly Wheel 15. Bolts lQyoass trough the fien'ge 1? of the sleeve lrsnd thdcentral portion 18 into the motor shaftle.

' Awster tenl; is provided for cooling the compressor cylinders and their pipe connec tions, the bottom of which tank is denoted by 20, its side *walls by 21 and its top by 22. The lower portions of the first'nnd second intermediate cylinders project below then bottomQO oi. the tanl: but the alls of the said cylinders are water-iac-keted as shown at 23, 242. A piston inlet-valveilo is provided for the low pressure cylinder 1, the air being admitted from the exterior through a passage 26 leading elongthe Wall of -the first intermediate cylinder 3.

The discharge valve for the low pressure cylinder is denoted by- 27; and is located irr' the inner plate'28 of the air headiifl of the 1 pressure discharge air head is denoted by 29 I and projects through the top 22 of th e'water tank. ,The air head of the low pressure cylinder 1 is made in the shape-oi" a fiat rememe?" cciver and its capacity sollicient to take: all of the fluid compress 'nnng e low pressure from this to l; 8% to the morler side of he inletrslvc of the first intermediate cylinder The discharge valve for this first inlcrmcrlintc cylinder denote-cl lay The coil surrounds the low pi .ssnr cylinder Tl Within the coil 51 oml from he (lischsrge valve 01*, the tir intermediate cylinclor to the under sifle oi the inlet valve 37 of the second intermediate cylincler 5, 'llThe discharge valve of lll'ilS second intermetllitlc cyliniicr is olenotc l log/"38 oncl the coil 39 leads from this (lischsrge valve 38 to the under sicle off-the inlet valve lo of the high pressure cylinder 7, which pipe coil surrounds the soicl high pressure cvlincler.

'lhc discharge valve for the high pressure denoted. by and. the coil ercfrom to e moisture.collcctii:g tank ecl below 39 2 ll leocls from the high. pres sure incisors collecting tank 4:15 to the re ccirer, not shown herein.

All of the valves herein described erect the ring type sncl the perts'erc so arranged terh to t c'nl cooler. A pipe that the vfll'VBS Work vertically. The inlet anti outlet valves 34-, 35, oil the inter-- mediate cyli; tier 3 ere }")I'()v'l(l@(l with a. com mon leading to the under sicle oi the piston lencl. the inlet and discharge valves 37, of the secowgl intermediate cylincler are similarly pl ovhied with a common. passage leading to the under side of the piston 3. The curing for the valves 34, 35 compris a. lower n ei'nhcr 47 forming part the first intermediate cylinder head ll. on inlerinedieiic memler 4L9 em} on upper member 50. which members are rigidly secured together by bolts 51. Similarly the casing for the valve. comprises a lower member 52 forming part of the second inlerimarliate cylinder head an intermediate me! her 54: and on upper inemher 553 all of wh' :li inemhcrs the secured rigidly together by bolts 56. .-ne intermediate members nncl hove o. llniitecl rotary adjustment with respect to the lower ontl upper members so that the intermediate members may he 21 adjusted into position to he comhirico W to. the fixed lower once of ti ca ils mill 39. v v

The I. for Volts es 410., ll, consists of the of the hiszh nressure cylinder eel in the low higher pressures.

valves may be readily ohtoinerl. Access to the ilischarge valve 27 may he ohtsinecl by removing the outcr plnlc 29 and access to the piston inlet valve may he obtained by removing the outer plate 29 cncl inner plate 98 of the low pressure clischmz'ge heaol.

Access to the valves 34;, 35, may he reociily obtained by removing the upper member .)0; to the valves 37 38 by removing the upper member 55, and to the valves 0,121 by removing; the outer plate 58. It will thus he soon that access to the several volyes'mey he obtained in a very simple manner Without interfering with the assembly of the other ports the machine.

A circulation of Waiter is insurcel Within the water tc'nl: by providing circulating pump 59 clriven, directly from the crank shaft 10 of the compressor. This pump has an inlet pipe 61 leading from soitehle source of Water supply, not shown, herein. and a discharge pipe leeeling several branches to the water tonic The tank further provided "with an overflow pipe 62 therein. The base 9* tended. as shown at 9*. forming o. su'plaort for the motor 13. The bottom 20 of the water tank is rigidly fixed to the frame 9, the frame 9 is rigidly fixed to its hose 9* and. the first and. second intermediate cylinclers ere fixed rigidly to the bottom 20 of the tank. This arrangement of the parts serves to produce a. very strong and compact machine capable of successfully withstandinqthc greet strain to which it is subjected when raising sir to in operation, the air as it passes into the low pressure cylinder 1 through the piston inlet mlrc 3:3, is cooled as it travels along the passage 96 at; the side of the first intermediate cylinder for the reason that the Willis oi"? the passage are exposed to thewete r Within the look. On the compression stroke, the air within the low pressure cylinder is forced post the discharge valve 2-? into the low pressure head 30. This air head is made of large capacity and is located within the 'Willltll? tool: so as to permit the coil to he made snliiciontly small in diameter to secure a more Qll CCtlXL; cooling surface. heretofore been. s'vmeil, this low. hood is of sulliciont capacity the air compressedin the low 5 imlcrfthns giving the coil 31 i time of a. revolution to carry air to the first intermediate cylimicr. Thisn'ill :WOltl the necessity of on excess of air seem to force the air tl'irougrh the soirl co1l. Tlhc oir sore t. eomyilct asses from the coil 31 into the l'noisture ooh P so that dry air may be taken into the first intermediate cylinder 3. The air then passes arrangement of the parts-as herein shown from the tank 32 through the pipe 33, inlet valve at? and passage l5 into the first intermediate cylinder. On the compression stroke, the air is forced from this cylinder through the passage past the dischargevalve e9 into the coil 36 and from thence it passes through the inlet valve 37 and pas' sage 46 into the second intermediate cylinder 5. 911 the compression stroke, the air is forced through the port 46 past the discharge valve 38 into the coil 39 and from thence past the inlet valve 40 into the discharge head 57 of the high pressure cylinder 7. On the compression stroke the air is forced from the cylinder through the discharge valve ll into the coil 42 and from thence it passes into the high pressure moisture collecting tank 43. From this tank the air passes to any suitable receiver, not shown herein. tween the back of the second intermediate cylinder 5 and the coil 36 through the passage 69. and pipe 63, so that any .air which may leak past the pistons in the second intermediate cylinder and high pressure cylinderasses into the said coil 36.

It will be seen that in the construction and and described, ,the low "pressure and high pressure discharge heads arelocated within the water tank Where they may be effectively cooled. lt willalso be seen that the outer plate 58 of the high pressure discharge head and the outer plate 29 of the low pressure discharge head be removed. without removing the trip 22 0f the tank or in any way disturbing are other parts of the machine. It will also lee seen that by. locating the discharge heads "for the first-land second intermediate cylinders below the Water tank andv v I the valve casingaaccess to the inlet discl xarge valvesof both of these cylin ersmay T be readily obtained Without disturbing the other parts or the apparatus. While I'have shown and described an air compressor, itisto be understood that the machine may be 'used for compressing. any other fluid without departing from the spirit and scope of my invention, "*TWhat I claim is:

1. A compound compressor comprising high, low and intermediate vertically arranged cylinders and their pistons, coils connecting the cylinders and an inclosed Water tank surrounding the coils and cyl-. inders, the low pressure discharge head being located within the tank and an outer plate for said low ,pressure discharge head,

said plate being exposed through the cover of the tank.

2. A compound compressor comprising high, low and intermediate vertically ar- Communication is established be-- and an inclosed water tank surrounding ranged cylinders and their pistons, coils connecting the cylinders and an inclosed water tank surrounding the coils and cylinders, the high pressure discharge head being located Within the tank and an outer plate for said high pressure discharge head, said plate being exposed through the cover of the tank.

3. A compound compressor comprising high, low and intermediate vertically arranged cylinders and their pistons, coils connecting the cylinders and an inclosed Water tank surrounding the coils and cylinders, the high and low pressure discharge heads being located Within vthe tank and outer plates for said high and low pressure discharge heads, said plates being exposed through the cover of the tank. v

4. A four-stage compognd compressor comprising high, low and-first and second and their pistons, coils connectingthe cylinders, and an inclosed water tank surrounding the coils and cylinders, the lower heads of the first and second intermediate cylinders being located exterior to said tank. 5. A four-stage compound compressor comprising high, .loW and first and second intermediate vertically arranged cylinders and their pistons, coils connecting the cylinders, the coils and cylinders-the lower heads 0 the first and second intermediate cylinders being located exterior to said tankand the upper heads of the highand low pressure cylinders being located. Within the tank.

6. A four-stage compound compressor com- I prising high, low and first and second intermediate ve'rtically arranged cylinders and their pistons,'the low and first intermediate cylinders being located in alinement and the high and second intermediate cylinders being located in alinement, coils connecting the cylinders, an inclosed Water tank surrounding the coils and cylinders and a separate passage leading from the back side of the second intermediate piston to the coil conmeeting the first and second intermediate cylinders for taking care of all leakage past the second intermediate and high pressurepistons.

7. A four-stage compound compressor coni- I prising high, low and first and second intermediate cylinders and their pistons, a coil surrounding the low pressure cylinder and leading therefrom to. the first intermediate cylinder, a second coil surrounding the low' pressure cylinder and leading from the first intermediate cylinder to thesecond intermediate cylinder, a third coil surrounding thehigh pressure cylinder and leading from the second intermediate cylinder to the high pressure cylinder, a fourth coil surrounding the high pressure cylinder and leading therefrom to the point of discharge and an 1220 the firs-,5, in'ioriiiwciia t 2 cyiimim' coil for mkin' :c nneciing the Q -L siii'lmmui (iii. id' 1m 1 wi'ili :1, combined. vulva chest ofiisat Q w W. immune cyiiiuiei's and mu SUTIO'iMidiLT ,iha W pressu cyii 'erini" to mini wit leading therefrom to time iii u iiijie mi 00111; izoiiprising eylia'i'ier, second coil sri'i'miniing *iierineiii:iii3 Wart iy arpmssm'oi yiimiw and i lin from and their pistons, c i

i0 ii'itmzii'iediutc 031711111451 m L114: wzcmid dime cyimdeiz, 2i Hui-(i. cmi MUTUUIU high pH. QUITE, (if;

seasonal ii ills iii-Ye vine 135st preaa'um syiimir I i i 511211; high pre '1 v N s f; 1 9.. ciiiiipouiid umiipi'essur (ZUF'YJpl 50 'm' and int lite mhiii'iiiliy mir- 3"! 1; and thin piston toils (10m 111% cyiinders and an i 0 mod waiter minding the 0011s and cylinder. v, the

' (191's hm CY)I11U1118(1 :35

'vhiu'gu vziive chesi's offset; the-: ifliill'idl' 10 said iii, each 01E said valve chwis being" prev ed with an outlet port" member iiavi iig {L innit-ed iwjitnry adjustcylinders, 1111 medium cylinrlai: to 51m];

back 0: the second innv said iiitm'nieii aiia'cyi 130i and (1155i care 01" all iez huge I dim and. high pike stuns E). A compound CUEJPPQESOE compriis high, low and intminiwj li'Q vertically ranged. Qyiindei-s, "iheil' pistons mini a com-- .u'ieni iim commuting; the. same to the fixed 60 33 high, low and int .f'nedizi 11103.; crank 5511a ft, coils connecting the cyiiiijioniiing coil' J T dew, 53H iiiir ioswji Win21. tank surrounding iiiq V i .1 i ciiiim the foregoing 0011:; and Cylinders :1 base and 11 frame rig; '1011, I have signed my name in f two wiaimsses, this fourth day Of .idiy :aliached 'ihei'eto, 1.10 bmimn of tambzai', M08,

wiiihiiir ttlliii being frame and the, in cylinders being; 11- tom,

10 A. compound, coinpi' V. utiachmi to szui Mp 00nd iiiiiiarn'm cdy attached. in i'iiui but- 

